What color is #3971AD?

#3971AD is a medium blue. In RGB it is rgb(57, 113, 173), and in HSL hsl(211, 50%, 45%).

Is #3971AD accessible as text?

On white, #3971AD has a contrast ratio of 5.07:1 (passes WCAG AA for body text); on black it is 4.14:1 (fails). For text placed on #3971AD, use white for the best readability.

What is the closest Tailwind color to #3971AD?

The nearest Tailwind CSS token is sky-700 (#0069A8).

What colors go well with #3971AD?

#3971AD pairs cleanly with neutrals — cream, taupe, charcoal and cool grays — and with its complementary #AC7539. In UI, a softer accent is often easier to use than the exact complement. Explore the harmonies, shades, tints and ready-made palettes for #3971AD below.

Is #3971AD good for buttons?

#3971AD works well for buttons and highlights, but use white text on #3971AD — black text only reaches 4.14:1, below the 4.5:1 needed for normal-size labels.

Is #3971AD the same as CSS steelblue?

No — #3971AD is not the CSS named color steelblue, but steelblue (#4682B4) is the closest CSS named color.

#3971AD Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #3971AD

Not just a swatch — here's how #3971AD works with other colors. Named schemes with #3971AD in its natural role, and a note on why the supporting colors balance it.

Coastal Morning Lead · 5 colors

Lead #3971AD Accent #A5C4C1 Surface #DDDBBF Secondary #9AA0A1 Anchor #20344A

Steel Blue opens this coastal palette with sea-glass and warm sand alongside it, grounded by driftwood grey and a deep-navy anchor.

Tech Product Signal · 5 colors

Signal #3971AD Surface #14161A Highlight #F4F6F8 Secondary #5A6672 Accent #6396CE

Steel Blue is the vivid signal in this product UI — on a near-black surface with cool white, a slate grey and a lighter tint of Steel Blue.

Vintage Leather Lead · 5 colors

Lead #3971AD Secondary #7F4537 Surface #E1DDC0 Accent #375245 Anchor #57233B

Steel Blue plays the worn-leather lead, deepened by saddle brown and an oxblood anchor, softened by aged cream and cooled by a muted forest green.

Berry & Cream Lead · 5 colors

Lead #3971AD Surface #EDE9D6 Anchor #5A2145 Accent #E4C2CB Secondary #322B2F

Steel Blue sits between cream and a deep berry here, softened by a blush accent and grounded by charcoal.

Minimal Editorial Surface · 5 colors

Surface #F6F4EF Accent #3971AD Secondary #879AB0 Support #959386 Ink #16140F

Steel Blue is the single accent in this high-contrast editorial system — set on near-white paper against near-black ink, with a warm grey and a desaturated tint of Steel Blue carrying the quiet middle.

Build a working theme in the generator →

Color Lab

How #3971AD actually behaves in design work — read from its OKLCH lightness, chroma and hue, not just its raw numbers. Ten signals to help you decide where this color earns its place.

Warmth 19/100

Cool

Reads cool and recessive — calming, technical, good for trust-led UI.

Softness 44/100

Moderate

Middle-weight — neither delicate nor heavy.

Depth 46/100

Moderate

Mid depth — usable as an accent or a muted ground.

Naturalness 0/100

Very low

Reads engineered rather than organic — synthetic, digital.

Vintage feel 53/100

Moderate

A faint retro warmth without tipping into sepia.

Luxury 54/100

Moderate

Understated — leans refined without going austere.

Brand distinctiveness 30/100

Low

Recognisable but shares space with nearby hues.

UI accent fit 96/100

Very high

Strong interactive accent — visible and can carry a legible label.

Surface fit 22/100

Low

Too saturated or mid-toned for big areas — keep it to accents.

Print safety 76/100

High

Reproduces faithfully in CMYK — safe for packaging and print.

Pairs with #3971AD

For UI

For branding

For interior

For fashion

People also use #3971AD with

Robin Egg Blue Dark Slate Blue Copper Gainsboro Charcoal

UI roles & guardrails

Primary action Safe as a filled button with white label. AA

Body text Passes on white at 16px and above. Pass

Large display Fine for headings 24px+ on white. Pass

Background Pair with white text at 5.1:1. Use

Subtle surface Use #D9E3ED for cards and hover fills. Tint 80

Avoid beside #394BAC — the hue gap is too small to read as intentional. Clash

In real applications

Not a swatch to memorise — a color to build with. Here is #3971AD at work across the surfaces designers actually ship.

Website / UI

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Dashboard

Revenue

$48.2k ▲ 12%

Brand

AVELINE

Studio

Poster

Nov 14 · 8PM

NIGHT
MARKET

Packaging

BLOOM

Botanical Wash

250 ml

Interior

Every model

Export

:root {
  --color-base: #3971AD;
  --color-base-rgb: 57 113 173;
  --color-base-oklch: oklch(53.9% 0.112 252.0);
  --color-50: #F3F7FC;
  --color-100: #E0EAF5;
  --color-200: #C2D6EB;
  --color-300: #97B7D8;
  --color-400: #7098C2;
  --color-500: #4E79A6;
  --color-600: #426080;
  --color-700: #33475C;
  --color-800: #24303C;
  --color-900: #181E25;
  --color-on-base: #FFFFFF;
}

// tailwind.config.js
colors: {
  steel-blue: {
    50: '#F3F7FC',
    100: '#E0EAF5',
    200: '#C2D6EB',
    300: '#97B7D8',
    400: '#7098C2',
    500: '#4E79A6',
    600: '#426080',
    700: '#33475C',
    800: '#24303C',
    900: '#181E25',
  },
}

$base: #3971AD;
$base-ink: #FFFFFF;
$base-50: #F3F7FC;
$base-100: #E0EAF5;
$base-200: #C2D6EB;
$base-300: #97B7D8;
$base-400: #7098C2;
$base-500: #4E79A6;
$base-600: #426080;
$base-700: #33475C;
$base-800: #24303C;
$base-900: #181E25;
$base-hover: #2E5A8A;
$base-subtle: #C5D4E5;

{
    "color": {
        "base": {
            "value": "#3971AD",
            "type": "color"
        },
        "onBase": {
            "value": "#FFFFFF",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F3F7FC",
                "type": "color"
            },
            "100": {
                "value": "#E0EAF5",
                "type": "color"
            },
            "200": {
                "value": "#C2D6EB",
                "type": "color"
            },
            "300": {
                "value": "#97B7D8",
                "type": "color"
            },
            "400": {
                "value": "#7098C2",
                "type": "color"
            },
            "500": {
                "value": "#4E79A6",
                "type": "color"
            },
            "600": {
                "value": "#426080",
                "type": "color"
            },
            "700": {
                "value": "#33475C",
                "type": "color"
            },
            "800": {
                "value": "#24303C",
                "type": "color"
            },
            "900": {
                "value": "#181E25",
                "type": "color"
            }
        }
    }
}

Palettes built on #3971AD

Color Lab

Pairs with #3971AD

UI roles & guardrails

In real applications

Scales

Every model

Export